standarddialogs

(You can also check this code in the repository)

"""PySide6 port of the widgets/dialogs/standarddialogs example from Qt v5.x"""

import sys
from PySide6.QtCore import QDir, QRect, Qt
from PySide6.QtGui import QFont, QPalette, QScreen
from PySide6.QtWidgets import (QApplication, QColorDialog, QCheckBox, QDialog,
                               QErrorMessage, QFontDialog, QFileDialog, QFrame,
                               QGridLayout, QGroupBox, QInputDialog, QLabel,
                               QLineEdit, QMessageBox, QPushButton,
                               QSizePolicy, QSpacerItem, QToolBox,
                               QVBoxLayout, QWidget)


class DialogOptionsWidget(QGroupBox):
    """Widget displaying a number of check boxes representing the dialog
       options."""
    def __init__(self, parent=None):
        super().__init__(parent)
        self._layout = QVBoxLayout(self)
        self._mapping = {}

    def value(self):
        result = 0
        for checkbox, value in self._mapping.items():
            if checkbox.isChecked():
                result |= value
        return result

    def add_checkbox(self, text, value):
        checkbox = QCheckBox(text)
        self._layout.addWidget(checkbox)
        self._mapping[checkbox] = value


class Dialog(QDialog):
    MESSAGE = ("<p>Message boxes have a caption, a text, and up to three "
               "buttons, each with standard or custom texts.</p>"
               "<p>Click a button to close the message box. Pressing the Esc "
               "button will activate the detected escape button (if any).</p>")

    def __init__(self, parent=None):
        super().__init__(parent)

        self._open_files_path = ''

        self._error_message_dialog = QErrorMessage(self)

        frame_style = QFrame.Sunken | QFrame.Panel

        self._integer_label = QLabel()
        self._integer_label.setFrameStyle(frame_style)
        self._integer_button = QPushButton("QInputDialog.get&Integer()")

        self._double_label = QLabel()
        self._double_label.setFrameStyle(frame_style)
        self._double_button = QPushButton("QInputDialog.get&Double()")

        self._item_label = QLabel()
        self._item_label.setFrameStyle(frame_style)
        self._item_button = QPushButton("QInputDialog.getIte&m()")

        self._text_label = QLabel()
        self._text_label.setFrameStyle(frame_style)
        self._text_button = QPushButton("QInputDialog.get&Text()")

        self._multiline_text_label = QLabel()
        self._multiline_text_label.setFrameStyle(frame_style)
        self._multiline_text_button = QPushButton("QInputDialog::get&MultiLineText()")

        self._color_label = QLabel()
        self._color_label.setFrameStyle(frame_style)
        self._color_button = QPushButton("QColorDialog.get&Color()")
        self._color_options = DialogOptionsWidget()
        self._color_options.add_checkbox("Show alpha channel",
                                         QColorDialog.ShowAlphaChannel)
        self._color_options.add_checkbox("No buttons",
                                         QColorDialog.NoButtons)

        self._font_label = QLabel()
        self._font_label.setFrameStyle(frame_style)
        self._font_button = QPushButton("QFontDialog.get&Font()")
        self._font_options = DialogOptionsWidget()
        self._font_options.add_checkbox("Do not use native dialog",
                                        QFontDialog.DontUseNativeDialog)
        self._font_options.add_checkbox("Show scalable fonts",
                                        QFontDialog.ScalableFonts)
        self._font_options.add_checkbox("Show non-scalable fonts",
                                        QFontDialog.NonScalableFonts)
        self._font_options.add_checkbox("Show monospaced fonts",
                                        QFontDialog.MonospacedFonts)
        self._font_options.add_checkbox("Show proportional fonts",
                                        QFontDialog.ProportionalFonts)
        self._font_options.add_checkbox("No buttons", QFontDialog.NoButtons)

        self._directory_label = QLabel()
        self._directory_label.setFrameStyle(frame_style)
        self._directory_button = QPushButton("QFileDialog.getE&xistingDirectory()")

        self._open_file_name_label = QLabel()
        self._open_file_name_label.setFrameStyle(frame_style)
        self._open_file_name_button = QPushButton("QFileDialog.get&OpenFileName()")

        self._open_file_names_label = QLabel()
        self._open_file_names_label.setFrameStyle(frame_style)
        self._open_file_names_button = QPushButton("QFileDialog.&getOpenFileNames()")

        self._save_file_name_label = QLabel()
        self._save_file_name_label.setFrameStyle(frame_style)
        self._save_file_name_button = QPushButton("QFileDialog.get&SaveFileName()")

        self._file_options = DialogOptionsWidget()
        self._file_options.add_checkbox("Do not use native dialog",
                                        QFileDialog.DontUseNativeDialog)
        self._file_options.add_checkbox("Show directories only",
                                        QFileDialog.ShowDirsOnly)
        self._file_options.add_checkbox("Do not resolve symlinks",
                                        QFileDialog.DontResolveSymlinks)
        self._file_options.add_checkbox("Do not confirm overwrite",
                                        QFileDialog.DontConfirmOverwrite)
        self._file_options.add_checkbox("Readonly", QFileDialog.ReadOnly)
        self._file_options.add_checkbox("Hide name filter details",
                                        QFileDialog.HideNameFilterDetails)
        self._file_options.add_checkbox("Do not use custom directory icons (Windows)",
                                        QFileDialog.DontUseCustomDirectoryIcons)

        self._critical_label = QLabel()
        self._critical_label.setFrameStyle(frame_style)
        self._critical_button = QPushButton("QMessageBox.critica&l()")

        self._information_label = QLabel()
        self._information_label.setFrameStyle(frame_style)
        self._information_button = QPushButton("QMessageBox.i&nformation()")

        self._question_label = QLabel()
        self._question_label.setFrameStyle(frame_style)
        self._question_button = QPushButton("QMessageBox.&question()")

        self._warning_label = QLabel()
        self._warning_label.setFrameStyle(frame_style)
        self._warning_button = QPushButton("QMessageBox.&warning()")

        self._error_label = QLabel()
        self._error_label.setFrameStyle(frame_style)
        self._error_button = QPushButton("QErrorMessage.showM&essage()")

        self._integer_button.clicked.connect(self.set_integer)
        self._double_button.clicked.connect(self.set_double)
        self._item_button.clicked.connect(self.set_item)
        self._text_button.clicked.connect(self.set_text)
        self._multiline_text_button.clicked.connect(self.set_multiline_text)

        self._color_button.clicked.connect(self.set_color)
        self._font_button.clicked.connect(self.set_font)
        self._directory_button.clicked.connect(self.set_existing_directory)
        self._open_file_name_button.clicked.connect(self.set_open_file_name)
        self._open_file_names_button.clicked.connect(self.set_open_file_names)
        self._save_file_name_button.clicked.connect(self.set_save_file_name)
        self._critical_button.clicked.connect(self.critical_message)
        self._information_button.clicked.connect(self.information_message)
        self._question_button.clicked.connect(self.question_message)
        self._warning_button.clicked.connect(self.warning_message)
        self._error_button.clicked.connect(self.error_message)

        vertical_layout = QVBoxLayout(self)
        toolbox = QToolBox()

        vertical_layout.addWidget(toolbox)
        page = QWidget()
        layout = QGridLayout(page)
        layout.addWidget(self._integer_button, 0, 0)
        layout.addWidget(self._integer_label, 0, 1)
        layout.addWidget(self._double_button, 1, 0)
        layout.addWidget(self._double_label, 1, 1)
        layout.addWidget(self._item_button, 2, 0)
        layout.addWidget(self._item_label, 2, 1)
        layout.addWidget(self._text_button, 3, 0)
        layout.addWidget(self._text_label, 3, 1)
        layout.addWidget(self._multiline_text_label, 4, 1)
        layout.addWidget(self._multiline_text_button, 4, 0)
        spacer = QSpacerItem(0, 0, QSizePolicy.Ignored, QSizePolicy.MinimumExpanding)
        layout.addItem(spacer, 5, 0)
        toolbox.addItem(page, "Input Dialogs")

        page = QWidget()
        layout = QGridLayout(page)
        layout.addWidget(self._color_button, 0, 0)
        layout.addWidget(self._color_label, 0, 1)
        spacer = QSpacerItem(0, 0, QSizePolicy.Ignored, QSizePolicy.MinimumExpanding)
        layout.addItem(spacer, 1, 0)
        layout.addWidget(self._color_options, 2, 0, 1, 2)
        toolbox.addItem(page, "Color Dialog")

        page = QWidget()
        layout = QGridLayout(page)
        layout.addWidget(self._font_button, 0, 0)
        layout.addWidget(self._font_label, 0, 1)
        spacer = QSpacerItem(0, 0, QSizePolicy.Ignored, QSizePolicy.MinimumExpanding)
        layout.addItem(spacer, 1, 0)
        layout.addWidget(self._font_options, 2, 0, 1, 2)
        toolbox.addItem(page, "Font Dialog")

        page = QWidget()
        layout = QGridLayout(page)
        layout.addWidget(self._directory_button, 0, 0)
        layout.addWidget(self._directory_label, 0, 1)
        layout.addWidget(self._open_file_name_button, 1, 0)
        layout.addWidget(self._open_file_name_label, 1, 1)
        layout.addWidget(self._open_file_names_button, 2, 0)
        layout.addWidget(self._open_file_names_label, 2, 1)
        layout.addWidget(self._save_file_name_button, 3, 0)
        layout.addWidget(self._save_file_name_label, 3, 1)
        spacer = QSpacerItem(0, 0, QSizePolicy.Ignored, QSizePolicy.MinimumExpanding)
        layout.addItem(spacer, 4, 0)
        layout.addWidget(self._file_options, 5, 0, 1, 2)

        toolbox.addItem(page, "File Dialogs")

        page = QWidget()
        layout = QGridLayout(page)
        layout.addWidget(self._critical_button, 0, 0)
        layout.addWidget(self._critical_label, 0, 1)
        layout.addWidget(self._information_button, 1, 0)
        layout.addWidget(self._information_label, 1, 1)
        layout.addWidget(self._question_button, 2, 0)
        layout.addWidget(self._question_label, 2, 1)
        layout.addWidget(self._warning_button, 3, 0)
        layout.addWidget(self._warning_label, 3, 1)
        layout.addWidget(self._error_button, 4, 0)
        layout.addWidget(self._error_label, 4, 1)
        spacer = QSpacerItem(0, 0, QSizePolicy.Ignored, QSizePolicy.MinimumExpanding)
        layout.addItem(spacer, 5, 0)
        toolbox.addItem(page, "Message Boxes")

        self.setWindowTitle("Standard Dialogs")

    def set_integer(self):
        i, ok = QInputDialog.getInt(self,
                "QInputDialog.getInteger()", "Percentage:", 25, 0, 100, 1)
        if ok:
            self._integer_label.setText(f"{i}%")

    def set_double(self):
        d, ok = QInputDialog.getDouble(self, "QInputDialog.getDouble()",
                "Amount:", 37.56, -10000, 10000, 2)
        if ok:
            self._double_label.setText(f"${d:g}")

    def set_item(self):
        items = ("Spring", "Summer", "Fall", "Winter")

        item, ok = QInputDialog.getItem(self, "QInputDialog.getItem()",
                "Season:", items, 0, False)
        if ok and item:
            self._item_label.setText(item)

    def set_text(self):
        text, ok = QInputDialog.getText(self, "QInputDialog.getText()",
                "User name:", QLineEdit.Normal,
                QDir.home().dirName())
        if ok and text != '':
            self._text_label.setText(text)

    def set_multiline_text(self):
        text, ok = QInputDialog.getMultiLineText(self, "QInputDialog::getMultiLineText()",
                "Address:", "John Doe\nFreedom Street")
        if ok and text != '':
            self._multiline_text_label.setText(text)

    def set_color(self):
        options_value = self._color_options.value()
        options = QColorDialog.ColorDialogOptions(options_value)
        color = QColorDialog.getColor(Qt.green, self, "Select Color", options)

        if color.isValid():
            self._color_label.setText(color.name())
            self._color_label.setPalette(QPalette(color))
            self._color_label.setAutoFillBackground(True)

    def set_font(self):
        options_value = self._font_options.value()
        options = QFontDialog.FontDialogOptions(options_value)

        description = self._font_label.text()
        default_font = QFont()
        if description:
            default_font.fromString(description)

        ok, font = QFontDialog.getFont(default_font, self, "Select Font", options)
        if ok:
            self._font_label.setText(font.key())
            self._font_label.setFont(font)

    def set_existing_directory(self):
        options_value = self._file_options.value()
        options = QFileDialog.Options(options_value) | QFileDialog.ShowDirsOnly

        directory = QFileDialog.getExistingDirectory(self,
                "QFileDialog.getExistingDirectory()",
                self._directory_label.text(), options)
        if directory:
            self._directory_label.setText(directory)

    def set_open_file_name(self):
        options_value = self._file_options.value()
        options = QFileDialog.Options(options_value)

        fileName, filtr = QFileDialog.getOpenFileName(self,
                "QFileDialog.getOpenFileName()",
                self._open_file_name_label.text(),
                "All Files (*);;Text Files (*.txt)", "", options)
        if fileName:
            self._open_file_name_label.setText(fileName)

    def set_open_file_names(self):
        options_value = self._file_options.value()
        options = QFileDialog.Options(options_value)

        files, filtr = QFileDialog.getOpenFileNames(self,
                "QFileDialog.getOpenFileNames()", self._open_files_path,
                "All Files (*);;Text Files (*.txt)", "", options)
        if files:
            self._open_files_path = files[0]
            file_list = ', '.join(files)
            self._open_file_names_label.setText(f"[{file_list}]")

    def set_save_file_name(self):
        options_value = self._file_options.value()
        options = QFileDialog.Options(options_value)

        fileName, filtr = QFileDialog.getSaveFileName(self,
                "QFileDialog.getSaveFileName()",
                self._save_file_name_label.text(),
                "All Files (*);;Text Files (*.txt)", "", options)
        if fileName:
            self._save_file_name_label.setText(fileName)

    def critical_message(self):
        reply = QMessageBox.critical(self, "QMessageBox.critical()",
                Dialog.MESSAGE,
                QMessageBox.Abort | QMessageBox.Retry | QMessageBox.Ignore)
        if reply == QMessageBox.Abort:
            self._critical_label.setText("Abort")
        elif reply == QMessageBox.Retry:
            self._critical_label.setText("Retry")
        else:
            self._critical_label.setText("Ignore")

    def information_message(self):
        reply = QMessageBox.information(self,
                "QMessageBox.information()", Dialog.MESSAGE)
        if reply == QMessageBox.Ok:
            self._information_label.setText("OK")
        else:
            self._information_label.setText("Escape")

    def question_message(self):
        reply = QMessageBox.question(self, "QMessageBox.question()",
                Dialog.MESSAGE,
                QMessageBox.Yes | QMessageBox.No | QMessageBox.Cancel)
        if reply == QMessageBox.Yes:
            self._question_label.setText("Yes")
        elif reply == QMessageBox.No:
            self._question_label.setText("No")
        else:
            self._question_label.setText("Cancel")

    def warning_message(self):
        msg_box = QMessageBox(QMessageBox.Warning,
                "QMessageBox.warning()", Dialog.MESSAGE,
                QMessageBox.NoButton, self)
        msg_box.addButton("Save &Again", QMessageBox.AcceptRole)
        msg_box.addButton("&Continue", QMessageBox.RejectRole)
        if msg_box.exec() == QMessageBox.AcceptRole:
            self._warning_label.setText("Save Again")
        else:
            self._warning_label.setText("Continue")

    def error_message(self):
        self._error_message_dialog.showMessage("This dialog shows and remembers "
                "error messages. If the checkbox is checked (as it is by "
                "default), the shown message will be shown again, but if the "
                "user unchecks the box the message will not appear again if "
                "QErrorMessage.showMessage() is called with the same message.")
        self._error_label.setText("If the box is unchecked, the message won't "
                "appear again.")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = Dialog()
    availableGeometry = dialog.screen().availableGeometry()
    dialog.resize(availableGeometry.width() / 3, availableGeometry.height() * 2 / 3)
    dialog.move((availableGeometry.width() - dialog.width()) / 2,
                (availableGeometry.height() - dialog.height()) / 2)
    sys.exit(dialog.exec())